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Ash or ashes are the solid remains of fires. Specifically, it refers to all non-aqueous, non-gaseous residues that remain after something is burned. In analytical chemistry, in order to analyse the mineral and metal content of chemical samples, ash is the non-gaseous, non-liquid residue after a complete combustion.
Ashes as the end product of incomplete combustion will be mostly mineral, but usually still contain an amount of combustible organic or other oxidizable residues. The most well-known type of ash is wood ash, as a product of wood combustion in campfires, fireplaces, etc. The darker the wood ashes, the higher the content of remaining charcoal will be due to incomplete combustion.
- Wood ash
- Products of coal combustion
- Cigar ash, the ash produced when a cigar is smoked
- Incinerator bottom ash, a form of ash produced in incinerators
- Vibhuti, ash used in Hindu rituals
- Ashes and dried bone fragments, or "cremains", left from cremation
- Volcanic ash, ash that consists of glass, rock, and other minerals that appears during an eruption
- Cinereous, consisting of ashes, ash-coloured or ash-like
- Howard et al. 2002: Healthy Villages A guide for communities and community health workersCHAPTER 8 Personal, domestic and community hygiene. WHO. Accessed Oct. 2014. http://www.who.int/water_sanitation_health/hygiene/settings/hvchap8.pdf
- WHO 2014: Water Sanitation Health. How can personal hygiene be maintained in difficult circumstances? Accessed Oct. 2014 http://www.who.int/water_sanitation_health/emergencies/qa/emergencies_qa17/en/